Boot Repair forced Ubuntu to load Unity2D and the mouse cursor freezed

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http://askubuntu.com – I am a GRUB noob and I would appreciate if you could help me with my issues. I want to install several GNU/Linux Distros but I broke GRUB so I used boot-repair to fix it. I wanted to have a separated /boot partition on /dev/sda1 containing the following options: /dev/sda5 -> my old Ubuntu 12.04 x64 / /dev/sda6 -> /home for Ubuntu in sda5 /dev/sda10 -> LinuxMint I first ran the boot-repair with "Recomended repair" and it left my system unusable so I ran it again by expanding the "Advanced options" section. These are the options that I used: from the "Main options" tab I chec (HowTos)